Debian Wheezy and perl modules installed into /root not system

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http://unix.stackexchange.com – I have small problem cause everytime i issue cpan YAML or try to install any perl module it install's it inito /root/perl5 and with this any other user cannot use modules that I've installed as a root. Even if I do rm -frv /root/perl5 /root/.cpan and rerun cpan YAML it still installs into root home dir. How can i change this ? (HowTos)